Optimal design and control of double-effect distillation systems

A general, rigorous dynamic model is described for studying the interactions of design and control in double-effect distillation systems. A sequential strategy for optimal design and control is implemented for a binary system; potential operability bottlenecks are identified and the economic advantage of double-effect systems over conventional single column systems is demonstrated. A simultaneous optimization strategy is also adopted and used to obtain a more economically beneficial double-effect design and control system than that obtained using the sequential approach